Mixing Characteristics and Bubble Behavior in an Airlift Internal Loop Reactor with Low Aspect Ratio

张伟鹏; 雍玉梅; 张广积; 杨超; 毛在砂

doi:10.1016/S1004-9541(14)60089-6

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Mixing Characteristics and Bubble Behavior in an Airlift Internal Loop Reactor with Low Aspect Ratio

催化、动力学与反应工程 | Updated：2026-01-06

- Mixing Characteristics and Bubble Behavior in an Airlift Internal Loop Reactor with Low Aspect Ratio
- Chinese Journal of Chemical Engineering Vol. 22, Issue 6, Pages: 611-6211004-954160089-6(2014)
- Affiliations：
  
  Key Laboratory of Green Process and Engineering, National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(14)60089-6
  CLC：
- Published：2014
- Accepted：
Scan QR Code
ZHANG Weipeng, YONG Yumei, ZHANG Guangji, YANG Chao, MAO Zaisha . Mixing Characteristics and Bubble Behavior in an Airlift Internal Loop Reactor with Low Aspect Ratio[J]. Chin.J.Chem.Eng., 2014, 22(6): 611-621.
DOI：

ZHANG Weipeng, YONG Yumei, ZHANG Guangji, YANG Chao, MAO Zaisha . Mixing Characteristics and Bubble Behavior in an Airlift Internal Loop Reactor with Low Aspect Ratio[J]. Chin.J.Chem.Eng., 2014, 22(6): 611-621. DOI： 10.1016/S1004-9541(14)60089-6.

摘要

Abstract

The present study summarizes the results of macro- and micro-mixing characteristics in an airlift internal loop reactor with low aspect ratio (H/D≤5) using the electrolytic tracer response technique and the method of parallel competing reactions respectively. The micro-mixing has never been investigated in airlift loop reactors. The dual-tip electrical conductivity probe technique is used for measurement of local bubble behavior in the reactor. The effects of several operating parameters and geometric variables are investigated. It is found that the increase in superficial gas velocity corresponds to the increase in energy input

liquid circulation velocity and shear rate

decreasing the macro-mixing time and segregation index. Moreover

it is shown that top clearance and draft diameter affect flow resistance. However

the bubble redistribution with a screen mesh on the perforated plate distributor for macro-mixing is insignificant. The top region with a high energy dissipation rate is a suitable location for feeding reactants. The analysis of present experimental data provides a valuable insight into the interaction between gas and liquid phases for mixing and improves the understanding of intrinsic roles of hydrodynamics upon the reactor design and operating parameter selection.

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